Method and means for determining air mass in a crankcase scaveng

Details Method and means for determining air mass in a crankcase scaveng Method and means for determining air mass in a crankcase scaveng

1990-02-23

1991-01-29

Myracle, Jerry W.

Measuring and testing

Simulating operating condition

Marine

123478, G01M 1500

Patent

active

049877739

ABSTRACT:
The mass of air available for combustion within a cylinder of a crankcase scavenged two-stroke engine is obtained by estimating the mass of air trapped within a crankcase chamber, prior to its transfer to the associated cylinder combustion chamber. The estimate for air mass is derived from the product of pressure of the air in the crankcase chamber and the crankcase chamber volume at a selected engine cycle position during that portion of the engine cycle when the air is trapped and undergoes compression within the crankcase chamber divided by a factor containing the trapped air temperature at the selected engine cycle position.

REFERENCES:
patent: 4402294 (1983-09-01), McHugh et al.
patent: 4446523 (1984-05-01), Reinke
patent: 4461260 (1984-07-01), Nonaka et al.
patent: 4664090 (1987-05-01), Kabasin
patent: 4750352 (1988-06-01), Kolhoff
patent: 4788854 (1988-12-01), Javaherian
patent: 4873641 (1989-10-01), Nagaishi et al.

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